no not a lipo pack. i dont have one so i am only 99.99999999% sure that its cant use lipo because lipo is different then a 6cell pack.
and your question of 7.2v if you look at ur charger (if you have one with a readout) when a pack peaks it peaks usually over 9v even one from a few years ago. but lipo runs differently so they take special ESCs
Xray '007 US and a bunch of other outdated stuff